Redox Reactions

The species which does not undergo disproportionation reaction is

[JEE Main 2025, 22 Jan (Shift 2)]

Chlorine undergoes disproportionation in alkaline medium as shown below

\(\mathrm{a}{\mathrm{Cl}}_{2}(\mathrm{g})+\mathrm{b}{\mathrm{OH}}^{-}(\mathrm{aq})\to \mathrm{c}{\mathrm{ClO}}_{3}^{−}(\mathrm{aq})+\mathrm{d}{\mathrm{Cl}}^{-}(\mathrm{aq})+\mathrm{e}{\mathrm{H}}_{2}\mathrm{O}(\mathrm{l})\)

The values of \(a, b, c\) and \(d\) in a balanced redox reaction are respectively

[JEE Main 2024, 29 Jan (Shift 1)]

Which reaction is NOT a redox reaction?

[NEET 2024]

Which of the following does not show disproportionation reaction? (memory based jee mains shift-2 22/01/2025)

Which of the following cannot function as an oxidising agent?

During the preparation of Mohr's salt solution (Ferrous ammonium sulphate), which of the following acid is added to prevent hydrolysis of \(F{e}^{2+}\) ion?

[NEET 2024]

Which of the following does not show disproportionation reaction? (memory based jee mains shift-2 22/01/2025)

Volume of M/8 \(KMn{O}_{4}\) solution required to react completely with 25.0 \(c{m}^{3}\) of M/4 \(FeS{O}_{4}\) in acidic medium is:

Thiosulphate reacts differently with iodine and bromine in the reaction given below:

\(2{\text{S}}_{2}{{\text{O}}_{3}}^{2−}+{\text{I}}_{2}\to {\text{S}}_{4}{{\text{O}}_{6}}^{2−}+2{\text{I}}^{−}\)

\({\text{S}}_{2}{{\text{O}}_{3}}^{2−}+5{\mathrm{Br}}_{2}+5{\text{H}}_{2}\text{O}\to 2{\mathrm{SO}}_{4}^{2−}+4{\mathrm{Br}}^{−}+10{\text{H}}^{+}\)

Which of the following statement justifies the above dual behaviour of thiosulphate?

Given below are two statements:
Statement I: In the oxalic acid vs \(KMn{O}_{4}\) (in the presence of dil \({H}_{2}S{O}_{4}\) ) titration the solution needs to be heated initially to \(60^\circ C\), but no heating is required in Ferrous ammonium sulphate (FAS) vs \(KMn{O}_{4}\) titration (in the presence of dil \({H}_{2}S{O}_{4}\) )

Statement II: In oxalic acid vs \(KMn{O}_{4}\) titration, the initial formation of \(MnS{O}_{4}\) takes place at high temperature, which then acts as catalyst for further reaction. In the case of FAS vs \(KMn{O}_{4}\), heating oxidizes \(F{e}^{2+}\) into \(F{e}^{3+}\) by oxygen of air and error may be introduced in the experiment.

In the light of the above statements, choose the correct answer from the options given below

[JEE Main 2025, 28 Jan (Shift 1)]

Chlorine undergoes disproportionation in alkaline medium as shown below:

\({\mathrm{aCl}}_{2}(\mathrm{g})+{\mathrm{bOH}}^{−}(\mathrm{aq})\to {\mathrm{cClO}}^{−}(\mathrm{aq})+{\mathrm{dCl}}^{−}(\mathrm{aq})+{\mathrm{eH}}_{2}\mathrm{O}(\mathrm{l})\)

The values of a, b, c and d in a balanced redox reaction are respectively:

Which of the following reaction(s) is/are correct?

(a) \(F{e}^{3+}+{I}^{-}⟶{I}_{2}+F{e}^{2+}\)
(b) \(F{e}^{3+}+{I}^{-}⟶Fe{I}_{3}\)
(c) \(F{e}^{2+}+{S}_{2}{O}_{8}^{2-}⟶Fe+2S{O}_{4}^{2-}\)
(d) \(F{e}^{2+}+{S}_{2}{O}_{8}^{2-}⟶F{e}^{3+}+2S{O}_{4}^{2-}\)